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Aramaki Lab
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A lab that explores the mechanisms of gels and cleaning through molecular assemblies of surfactants.
AboutAbout the lab
Studying gels and cleaning through how molecules assemble.
The Aramaki Lab studies the properties of materials involved in gels and cleaning, focusing on molecular assemblies formed when molecules such as surfactants gather together.
The lab investigates the structures of micelles and liquid crystals that surfactants form in water, and the thickening and gelation that result from them.
To improve the mechanical properties of gels, it also works on orthogonal hydrogels, which combine networks of molecular assemblies with different properties.
The lab has also published papers on the foam of dishwashing detergents and on how long antibacterial and antiviral effects last after handwashing.
Key terms
- Surfactant
- A molecule that adsorbs at surfaces and interfaces and, when its concentration rises in water, forms molecular assemblies such as micelles and liquid crystals
- Molecular assembly
- A structure formed when molecules such as surfactants gather together; examples include micelles and lyotropic liquid crystals
- Orthogonal hydrogel
- A gel in which a flexible network of surfactant molecular assemblies and a rigid network of supramolecular fibers coexist
ResearchResearch themes
The lab investigates the structures and properties of molecular assemblies formed by surfactants and similar molecules, and studies phenomena related to gels and cleaning. One of its goals is to build soft matter useful as a base for pharmaceuticals, cosmetics, and the like.
*Illustrative imageOrthogonal Hydrogels
The lab studies gels in which a flexible network of surfactants coexists with a rigid network of supramolecular fibers. It examines how differences in assembly structure affect the rate of fiber formation and the mechanical properties of the gel.
*Illustrative imageFoaming of Dishwashing Detergents
The lab investigates ingredients that improve foaming while maintaining cleaning power, and how they work. It evaluates how easily foam forms by how quickly dynamic surface tension changes, and has also proposed a new index of foam persistence that takes the effect of oil into account.
*Illustrative imagePersistence of Antibacterial Effects After Handwashing
The lab has a co-authored paper examining how long antibacterial and antiviral effects last after washing hands with a fatty acid salt hand soap. Combining an anionic surfactant with a cationic polymer, it reports that the effect was maintained up to 4 hours later.
MembersFaculty
- ProfessorKenji Aramaki
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Dülmen, Dernekamp, Seifenblase” Dietmar Rabich / CC BY-SA 4.0 (cropped)
- Orthogonal Hydrogels: “Picture of peptide hydrogel formation shown by the inverted vial method” Hutchinson Jessica / CC BY-SA 4.0 (cropped)
- Foaming of Dishwashing Detergents: “Flurry of foam released at Travis (12)” U.S. Air Force photo/Ken Wright/Released / Public domain (cropped)
- Persistence of Antibacterial Effects After Handwashing: “A touchless handwashing tap and solid bar soap dispenser kit” Wabyona Bingi / CC BY-SA 4.0 (cropped)
- Related lab (Organic Chemistry Lab): “Praseodymium chloride heptahydrate under fluorescent lamp light and halogen lamp light” Spidey71 / CC BY-SA 3.0 (cropped)
- Related lab (Biological Systems Engineering Lab): “Making probiotics cabbage carrot” Zenyrgarden / CC BY-SA 4.0 (cropped)
- Related lab (Physical Organic Chemistry and Molecular Design Lab): “Chlorophacinone-3D-molecular-model-engraved-render-CAS” MolGod Scientific / CC BY-SA 4.0 (cropped)
- Related lab (Biophysical Chemistry and Structural Life Chemistry Lab): “Rhodopsin” AtikaAtikawa / CC BY-SA 4.0 (cropped)
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